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Intangible assets - Accumulated Amortization (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Intangible assets |  |
Value, at the beginning of the year | $ 7,592 | $ 7,659
Value, at the end of the year | 7,098 | 7,592
SAC | Fixed services |  |
Intangible assets |  |
Value, at the beginning of the year | 96 |
Value, at the end of the year | 77 | 96
SAC | Mobile Services |  |
Intangible assets |  |
Value, at the beginning of the year | 1,427 |
Value, at the end of the year | 1,140 | 1,427
Service connection or habilitation costs |  |
Intangible assets |  |
Value, at the beginning of the year | 119 |
Value, at the end of the year | 136 | 119
3G/4G licenses |  |
Intangible assets |  |
Value, at the beginning of the year | 5,105 |
Value, at the end of the year | 4,780 | 5,105
PCS license (Argentina) |  |
Intangible assets |  |
Value, at the beginning of the year | 588 |
Value, at the end of the year | 588 | 588
PCS and Band B (Paraguay) |  |
Intangible assets |  |
Value, at the end of the year | 3 |
Rights of use |  |
Intangible assets |  |
Value, at the beginning of the year | 244 |
Value, at the end of the year | 226 | 244
Exclusivity agreements |  |
Intangible assets |  |
Value, at the beginning of the year | 12 |
Value, at the end of the year | 11 | 12
Customer relationships |  |
Intangible assets |  |
Value, at the beginning of the year | 1 |
Value, at the end of the year | 135 | 1
Goodwill |  |
Intangible assets |  |
Value, at the end of the year | 2 |
Accumulated depreciation and amortization |  |
Intangible assets |  |
Value, at the beginning of the year | (4,196) | (3,192)
Acquisition Tuves Paraguay | (49) |
Amortization | (1,889) | (1,840)
Currency translation adjustments | (272) | (229)
Decreases | 1,523 | 1,065
Value, at the end of the year | (4,883) | (4,196)
Accumulated depreciation and amortization | SAC | Fixed services |  |
Intangible assets |  |
Value, at the beginning of the year | (130) | (118)
Amortization | (106) | (157)
Decreases | 169 | 145
Value, at the end of the year | (67) | (130)
Accumulated depreciation and amortization | SAC | Mobile Services |  |
Intangible assets |  |
Value, at the beginning of the year | (1,411) | (1,001)
Acquisition Tuves Paraguay | (47) |
Amortization | (1,385) | (1,288)
Currency translation adjustments | (26) | (15)
Decreases | 1,295 | 893
Value, at the end of the year | (1,574) | (1,411)
Accumulated depreciation and amortization | Service connection or habilitation costs |  |
Intangible assets |  |
Value, at the beginning of the year | (103) | (101)
Amortization | (33) | (29)
Decreases | 30 | 27
Value, at the end of the year | (106) | (103)
Accumulated depreciation and amortization | 3G/4G licenses |  |
Intangible assets |  |
Value, at the beginning of the year | (681) | (343)
Amortization | (325) | (338)
Value, at the end of the year | (1,006) | (681)
Accumulated depreciation and amortization | PCS license (Argentina) |  |
Intangible assets |  |
Value, at the beginning of the year | (70) | (70)
Value, at the end of the year | (70) | (70)
Accumulated depreciation and amortization | PCS and Band B (Paraguay) |  |
Intangible assets |  |
Value, at the beginning of the year | (951) | (774)
Currency translation adjustments | (202) | (177)
Value, at the end of the year | (1,153) | (951)
Accumulated depreciation and amortization | Rights of use |  |
Intangible assets |  |
Value, at the beginning of the year | (219) | (190)
Acquisition Tuves Paraguay | (2) |
Amortization | (29) | (27)
Currency translation adjustments | (3) | (2)
Decreases | 29 |
Value, at the end of the year | (224) | (219)
Accumulated depreciation and amortization | Exclusivity agreements |  |
Intangible assets |  |
Value, at the beginning of the year | (29) | (28)
Amortization | (1) | (1)
Value, at the end of the year | (30) | (29)
Accumulated depreciation and amortization | Customer relationships |  |
Intangible assets |  |
Value, at the beginning of the year | (1) | (1)
Amortization | (10) |
Value, at the end of the year | (11) | (1)
Accumulated depreciation and amortization | Software developed for internal use |  |
Intangible assets |  |
Value, at the beginning of the year | (601) | (566)
Currency translation adjustments | (41) | (35)
Value, at the end of the year | (642) | $ (601)
Tuves Paraguay | Customer relationships |  |
Intangible assets |  |
Value, at the end of the year | 134 |
Cubecorp | Customer relationships |  |
Intangible assets |  |
Value, at the end of the year | $ 1 |

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